I love people who go on about "doing the right thing".... what makes you think many company really "do the right thing" for their customers (price gouging and such), yeah a single 5850 is a drop in the bucket to them...so I say keep it.
DUDE, KEEP IT. and figure out how to fuck them worse in the future. Welcome to the amorality of capitalism. Welcome brother, leave your faithful shoes on the promontory.